/*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkFontStyle_DEFINED
#define SkFontStyle_DEFINED

#include "include/core/SkTypes.h"
#include "include/private/base/SkTPin.h"

#include <cstdint>

class SK_API SkFontStyle {
public:
    enum Weight {
        kInvisible_Weight = 0,
        kThin_Weight = 100,
        kExtraLight_Weight = 200,
        kLight_Weight = 300,
        kNormal_Weight = 400,
        kMedium_Weight = 500,
        kSemiBold_Weight = 600,
        kBold_Weight = 700,
        kExtraBold_Weight = 800,
        kBlack_Weight = 900,
        kExtraBlack_Weight = 1000,
    };

    enum Width {
        kUltraCondensed_Width = 1,
        kExtraCondensed_Width = 2,
        kCondensed_Width = 3,
        kSemiCondensed_Width = 4,
        kNormal_Width = 5,
        kSemiExpanded_Width = 6,
        kExpanded_Width = 7,
        kExtraExpanded_Width = 8,
        kUltraExpanded_Width = 9,
    };

    enum Slant {
        kUpright_Slant,
        kItalic_Slant,
        kOblique_Slant,
    };

    constexpr SkFontStyle(int weight, int width, Slant slant)
        : fValue((SkTPin<int>(weight, kInvisible_Weight, kExtraBlack_Weight)) +
        (SkTPin<int>(width, kUltraCondensed_Width, kUltraExpanded_Width) << 16) +
        (SkTPin<int>(slant, kUpright_Slant, kOblique_Slant) << 24))
    {}

    constexpr SkFontStyle() : SkFontStyle{ kNormal_Weight, kNormal_Width, kUpright_Slant } {}

    bool operator == (const SkFontStyle &rhs) const
    {
        return fValue == rhs.fValue;
    }

    int weight() const
    {
        return fValue & 0xFFFF;
    }
    int width() const
    {
        return (fValue >> 16) & 0xFF;
    }
    Slant slant() const
    {
        return (Slant)((fValue >> 24) & 0xFF);
    }

    static constexpr SkFontStyle Normal()
    {
        return SkFontStyle(kNormal_Weight, kNormal_Width, kUpright_Slant);
    }
    static constexpr SkFontStyle Bold()
    {
        return SkFontStyle(kBold_Weight, kNormal_Width, kUpright_Slant);
    }
    static constexpr SkFontStyle Italic()
    {
        return SkFontStyle(kNormal_Weight, kNormal_Width, kItalic_Slant);
    }
    static constexpr SkFontStyle BoldItalic()
    {
        return SkFontStyle(kBold_Weight, kNormal_Width, kItalic_Slant);
    }

private:
    friend class SkTypefaceProxyPrototype; // To serialize fValue
    int32_t fValue;
};

#endif
